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Question 2: What is a video conferencing system "video conferencing system - sometimes called" video conferencing "in English (Video Conference System), including software video conferencing system and hardware video conferencing system, is a video conferencing system. Refers to two or more individuals or groups in different places, through the existing telecommunication transmission media, the character of static, dynamic images, voice, text, pictures and other information sent to each user's computer, so that geographically dispersed users can **** get together in one place, through the graphic, sound and other ways to exchange information to increase the understanding of the contents of the two sides. At present, video conferencing gradually towards the direction of multi-network collaboration, high-definition, the development of the direction of the development.
Video conferencing as the most advanced communication technology, only with the help of the Internet, you can realize efficient high-definition teleconferencing, office, in the continuous enhancement of the user's communication efficiency, reduce the cost of corporate travel, improve management effectiveness, etc. has a unique advantage, has been partially replaced by business travel, become the latest mode of telecommuting.
In recent years, the application of video conferencing has expanded rapidly, from ***, public security, the military, the courts to science and technology, energy, health care, education and other fields can be found everywhere, covering all aspects of social life.
Question 3: What is the difference between digital conferencing system and video conferencing system Digital conferencing system is for people to speak, so as not to be heard, the simplest is to read the meeting on the rostrum of the microphone, and later add what the bidding, identification, conference hosting to get a system. Just use at this end, meeting, as long as the host opens the conference system equipment, we can speak through the desk microphone (other equipped with what echo suppressor ah, amplifier ah, sound ah on the Department said). Digital conference system, is audio, audio conferencing system. Digital conference is relative to the general analog conference. In fact, it is also a conference system, only the transmission of the signal is digital.
Video conferencing is the whole process of the meeting with a video camera to film the system. Is the use of video cameras will be the end of the image through the IP or ISDN transmission to the far end to go, and then use the LCD TV or plasma or computer monitors will be the other side of the image display, so that people in the meeting to see the remote video image. Videoconferencing is a meeting where you can see the images of both sides.
Question 4: What is the video conferencing system Video conferencing system is to convene a multi-party meeting for the purpose of using digital, coding and compression technology, simultaneous bi-directional multi-party transmission of images and sound to meet the needs of people meeting the new high-tech communication system; video conferencing system's basic attributes: long-distance transmission, multi-party simultaneous convening, real-time exchanges, a variety of media combinations, the use of economic networks and bandwidth. and bandwidth. Videoconferencing to the user's benefits: reduce commercial costs, faster, more convenient communication, faster, more convenient information **** enjoy, enhance overall office efficiency, increase competitiveness. Video conferencing applicable areas: applicable to a variety of organizational activities in various fields! Such as: ***, financial, manufacturing and so on.
Question 5: What is a high-definition video conferencing system? Everyone is familiar with Standard Definition (SD) analog television. This is what we know and have been using for decades.NTSC (used in North America and some other regions) has a horizontal resolution of 525 lines at 30 frames per second.PAL (used in other parts of the world) has 625 lines at 24 frames per second. The odd-numbered lines of the still picture are scanned first, and then the even-numbered lines of the same image information are scanned. In this way, both images are displayed on the monitor at the same time, also known as 50/60 fields per second. This odd/even scanning pattern is known as interlacing, and the technique was developed to conserve transmission bandwidth (the data rate capacity of a particular network connection). This resolution is known as 480i and provides a picture consisting of 240 lines of disparate information. The broadband requirement for SD for home use is 45-90 Mbit/s.
For small video displays (less than 27 inches), SD TVs look reasonably sharp and smooth. However, if the screen is larger than 27 inches, there is a noticeable degradation in image quality in 480i format. Jagged lines, blurred outlines, fading, visual noise, and intermittent motion may also be seen.
Progressive scan mode, an alternative to interlaced scanning, improves picture quality on larger screens. Progressive scanning technology combines 480 lines of image information rows into a single frame and then automatically corrects the picture quality. Progressive scanning reduces jagged images on the big screen and makes picture movement smoother. This resolution for standard definition TVs is called 480p.
True high-definition video displays images at resolutions of 1080i or 720p, while other resolutions are not true high-definition. The HD format provides more image information than any SD format. If you convert the screen resolution to pixels, it is clear that the HD format provides at least four times more image information than the 480i format. To visualize the difference, imagine a TV screen as a computer monitor. Imagine what a low-resolution digital image of 640 X 240 (equivalent to 480i) would look like stretched across a 42-inch screen. The image will be distorted because there is not enough image information in the low resolution image to provide a high quality view. The higher pixel counts available in high-resolution formats can enhance the quality of the image, making it appear sharper and smoother on the big screen. In video conferencing, this technology improves the overall visual experience and eliminates meeting fatigue. Colors are also more vibrant and realistic, and motion is clear and smooth.
Question 6: What exactly does a video conferencing system do? The video conferencing system breaks the limitation of time and space, so that even if the distance is very far or separated from each other, people can also be held in real-time meetings, and now the video conferencing system has been well integrated into all walks of life.
Question 7: What are the components of a complete video conferencing system? A complete video conferencing system is usually composed of video conferencing terminals, multi-point control unit MCU, network management software, transmission networks and related accessories. Due to the user's existing network conditions, hardware facilities are unique, so the video conferencing system in the video conferencing terminal system, multi-point conference controller MCU, network management software and other parts of the requirements, but also different. First, the classification of video conferencing terminal type The main video conferencing terminal has three kinds: desktop type, set-top box type, conference room type. 1, desktop terminal desktop terminal is a powerful desktop or laptop computer with high-quality camera (built-in or external), ISDN card or network card and video conferencing software of the exquisite combination. It can effectively enable people who are at their desks or who are traveling to join your meeting and communicate with you face-to-face. Main applications: Desktop videoconferencing terminals are usually assigned to special individuals in the office or people who are traveling for work. Although the desktop video conferencing terminal supports multi-point meetings (such as the meeting contains more than 2 meeting sites), but it is mostly used for point-to-point meetings (such as a person with another person's meeting). 2, set-top box type terminal Set-top box type terminal is known for its simplicity. In a unit containing all the hardware and software, placed on the TV. Easy to install, lightweight equipment. To open a video conference, you only need an ordinary TV set and an ISDN BRI line or a LAN connection. The video conferencing terminal can also be loaded with some peripheral devices such as document projector and whiteboard equipment to enhance the function. Main applications: Set-top box type terminals are usually a ****-enabled resource between departments and are suitable for organizations of all sizes from multinational corporations to small businesses. It is also often the first conference room type terminal purchased by a company. 3, conference room type terminal conference room type terminal provides almost any video conferencing solutions required, generally integrated in a conference room. Meeting room type terminal is usually combined with a large number of accessories, such as audio systems, additional cameras, document projectors, and PC collaborative document communication. Dual-screen display, rich communication interfaces, and graphic streaming options make the terminal a high-grade, comprehensive product. Main applications: conference room type terminals are mainly designed for medium and large enterprises. Second, the multi-point control unit MCU Multi-point control unit, also known as multi-point conference controller, the English name is Multi Control Unit, referred to as MCU. MCU is the key equipment of the multi-point video conferencing system, its role is equivalent to the role of a switch, which will come from the meeting points of the information flow, after synchronization and separation, to extract information and signaling audio, video, data, etc., and then the meeting points of information and signaling. The information and signaling of each conference site is sent to the same processing module to complete the corresponding audio mixing or switching, video mixing or switching, data broadcasting and routing, timing and conference control processes, and finally the various information required by the conference site is reassembled and sent to the corresponding terminal system equipment.
Question 8: What is the principle of video conferencing system? The principle of video conferencing system is to use the most advanced network communications technology to achieve two and more than two different places in different areas of individuals or groups, through the existing telecommunications communications transmission media, the character of the static and dynamic images, voice, text, pictures and other information sent to the various users of the computer, making the geographically dispersed users can **** gathered in one place, through graphics, sound and other ways to Exchange of information, increasing the ability of both sides to understand the content. Currently, video conferencing is gradually developing in the direction of multi-network collaboration, high-definition, development.
Videoconferencing uses the most advanced network communication technology, applicable to videoconferencing network technology standards are: H.320 protocol (for group videoconferencing on ISDN), H.323 protocol (for desktop videoconferencing on LAN), H.324 (for videoconferencing on telephone networks), H.310 (for videoconferencing on ATM and B-ISDN networks), and H.310 (for videoconferencing on ATM and B-ISDN networks), and H.323 protocol (for desktop videoconferencing on LAN). videoconferencing), H.310 (for videoconferencing over ATM and B-ISDN networks), and H.264 (highly compressed digital video codec standard). Among them, the H.323 protocol has become the most widely used and versatile protocol standard, while H.264 is the most advanced network audio and video codec technology.
Question 9: What kind of video conferencing system is good? You can conduct meetings, multi-party calls, voice over phone, voice over Internet, video **** enjoyment, text communication, in-session monitoring (call others, mute/unmute, suspected noise alerts, disconnect and reconnect), view the desktop **** enjoyment, invitations
Question 10: What are the benefits of multimedia video conferencing systems? Videoconferencing system refers to two or more individuals or groups in different places, through the transmission line and multimedia equipment, the sound, images and documents to each other, to achieve instant and interactive communication, in order to achieve the purpose of the meeting of the system equipment. Video conferencing system has a wide range of applications, can be used in network video conferencing, collaborative office, online training, telemedicine, distance learning and other aspects, can be widely used in ***, the military, business, IT, telecommunications, electricity, education, medical, securities, finance, manufacturing and other fields. Applications of video conferencing system: (1) *** level meeting (2) business negotiations (3) emergency rescue (4) combat maneuvers (5) banking system (6) distance learning (7) remote medical